4.11 Motor Brake And Stop Operation; Zero Speed Control, Pre-Excitation, Servo-On, And Servo Lock (Pr.10, Pr.11, Pr.795, Pr.802, Lx Signal, Son Signal) - Mitsubishi Electric FR-E700EX Instruction Manual

4.11 Motor brake and stop operation

Purpose
To adjust the braking operation
To activate the electromagnetic
brake by the output signal
To improve the motor braking
torque with an option
To coast the motor to a stop
4.11.1 Zero speed control, pre-excitation, servo-ON, and servo lock (Pr.10, Pr.11, Pr.795,
Pr.802, LX signal, SON signal)
Zero speed control is performed and applies braking torque to stop the motor.
Parameter
Name
number
10 Coasting speed
DC injection brake
11
operation time
795

DC brake torque boost
Pre-excitation selection
802

(brake operation selection)
The above parameters can be set when Pr.160 Extended function display selection = "0". (Refer to page 182)

When a value exceeding 3000 r/min is set, the rotation speed will be limited at 3000 r/min.
Also, when an S-PM geared motor is used, the maximum setting value differs depending on the drive unit capacity. (0.2 to 2.2K: 12000 r/min, 3.7K: 8000 r/
min)

This parameter is available with S-PM geared motors.

This parameter is available with MM-GKR motors.
...... Specifications differ according to the date assembled. Refer to page 316 to check the SERIAL number.
(1) Operation speed setting (Pr.10)
 When the speed at which coasting starts is set in Pr.10, output is shutoff when this speed is reached during deceleration
and motor starts coasting.
 When Pr.11  "0", Pr.10 is always set to 0r/min.
(2) Operation time setting (Pr.11)
 In Pr.11, set the time of DC injection brake control.
 When the motor does not stop due to large load moment (J), increasing the setting produces an effect.
 When Pr.11 = "0s", DC injection brake control is disabled. (At a stop, the motor coasts.)
Operation example with injection
brake control enabled (Pr.11
(r/min)
Zero speed control
or servo lock/ DC
injection brake
Parameter to set
DC injection brake, zero
speed control, servo lock
Electromagnetic brake
interlock
Selection of a
regenerative brake
Selection of motor
stopping method
Initial value Setting range
90r/min 0 to 4800r/min
0.5s
0.1 to 10s
0 to 150%
9999
0
"0")
Injection brake control
is exercised 0r/min.
Time
Time Zero speed control
or servo lock/ DC
Pr.11 Operation time
Motor brake and stop operation
Pr.10, Pr.11, Pr.795, Pr.802
Pr.736
Pr.30, Pr.70
Pr.10, Pr.11, Pr.250
The speed where the motor starts coasting
0 Injection brake control disabled
Operation time of injection brake control
Maximum torque that can be generated during
DC injection brake (pre-excitation) operation
9999 50% setting
0 Zero speed control
1 Servo lock
Operation example with injection brake
control disabled (Pr.11 = "0s")
(r/min)
Motor coasting
injection brake
Refer to page
131
135
136
137
Description
Pr.10
Coasting speed
Time
Time
131
4